This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A006441 M4754 #9 Apr 05 2021 11:58:21 %S A006441 10,595,11010,111650,773640,4104225,17838730,66390610,218140650 %N A006441 Number of nonseparable toroidal tree-rooted maps with n + 4 edges and n + 1 vertices. %C A006441 The number of faces is 3. - _Andrew Howroyd_, Apr 05 2021 %D A006441 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A006441 T. R. S. Walsh and A. B. Lehman, <a href="http://dx.doi.org/10.1016/0095-8956(75)90050-7">Counting rooted maps by genus. III: Nonseparable maps</a>, J. Combinatorial Theory Ser. B 18 (1975), 222-259. %Y A006441 Cf. A006414, A006415. %K A006441 nonn,more %O A006441 0,1 %A A006441 _N. J. A. Sloane_ %E A006441 Name clarified by _Andrew Howroyd_, Apr 05 2021